package com.flnet.api.interceptor;

import com.flnet.api.annotation.IgnoreAuth;
import com.flnet.api.domain.TbToken;
import com.flnet.api.service.ITbTokenService;
import com.flnet.api.service.impl.TbTokenServiceImpl;
import com.flnet.common.exception.api.ApiRRException;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

public class RestApiInterceptor extends HandlerInterceptorAdapter {

    public static final String LOGIN_USER_KEY = "LOGIN_USER_KEY";
    public static final String LOGIN_TOKEN_KEY = "X-Wash-Token";

    @Autowired
    private ITbTokenService tbTokenService;

    public static RestApiInterceptor restApiInterceptor;

    @PostConstruct
    public void init() {
        restApiInterceptor = this;
        restApiInterceptor.tbTokenService = this.tbTokenService;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("===RestApiInterceptor====preHandle");
        //支持跨域请求
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,X-Wash-Token,X-URL-PATH");
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        String mobile = request.getParameter("mobile");
        String password = request.getParameter("password");
        System.out.println("mobile:"+mobile+" password:"+password);
        IgnoreAuth annotation;
        if(handler instanceof HandlerMethod){
            annotation = ((HandlerMethod)handler).getMethodAnnotation(IgnoreAuth.class);
        }else{
            return true;
        }

        //如果有@IgnoreAuth注解，则不验证token
        if (annotation != null) {
            return true;
        }

        //从header中获取token
        String token = request.getHeader(LOGIN_TOKEN_KEY);
        //如果header中不存在token，则从参数中获取token
        if (StringUtils.isBlank(token)) {
            token = request.getParameter(LOGIN_TOKEN_KEY);
        }

        //token为空
        if (StringUtils.isBlank(token)) {
            throw new ApiRRException("请先登录", 401);
        }

        //查询token信息
        TbToken tokenEntity = restApiInterceptor.tbTokenService.queryByToken(token);
        if (tokenEntity == null || tokenEntity.getExpireTime().getTime() < System.currentTimeMillis()) {
            throw new ApiRRException("token失效，请重新登录", 401);
        }

        //设置userId到request里，后续根据userId，获取用户信息
        request.setAttribute(LOGIN_USER_KEY, tokenEntity.getUserId());
        return true;
    }
}
